{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-08owb7an","versions":[{"created_at":"2026-06-10T23:06:34Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20018747 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ba8b0e5d4846c2f4e10619c3dae0d6403e56da6e54ba998e8bc9ef71afdcf59c","version":9},{"created_at":"2026-06-10T22:34:57Z","element_count":91,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f98e8d638a2b1496b371152d12ea47ae97e48254096d351be882b5de9c37d62e","version":6}]}